Bug Description

See attached image Dash_focused_button_state.png , this image shows the differences between the design and the current implementation of the focused state of Dash Previews buttons. However note that the attached design shows the button in the 'on-click' state.

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Desired solution:

- Update the Dash Preview buttons to make the button fill slightly more transparent.

In terms of dash consistency, the design shows the button in 'active' state, not the 'focused' state, meaning that the button is currently pressed.

If you have a look at the dash filters, and move the mouse over the buttons, the focus will shift, showing the same design as in the current previews. Only if you click a "checkable" button, then does the design change to that of the screenshot of the preview design.

The preview actions are not "checkable" (ie they cannot be persistently active). If you click and hold the left mouse button on a preview action, then you will see the button design with a thick border.

If you still want the button to match your given designs, I will change it.